Spring project obfuscation using proguard using Maven - spring

Question

is there any good example for obfuscating Spring application using proguard & Maven ? I tried adding this snippet in pom.xml. My project is compiling and running, but did not get obfuscated.
I was able to decompile my war file and view the code. Is there any setting required to obfuscate generated file ??
<!-- ProGuard obfuscation plugin -->
<plugin>
<groupId>com.github.wvengen</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<version>2.0.6</version>
<executions>
<execution>
<configuration>
<obfuscate>true</obfuscate>
<proguardVersion>5.2.1</proguardVersion>
<options>
<option>-target 1.7</option>
<option>-dontnote</option>
<option>-dontpreverify</option>
<option>-dontskipnonpubliclibraryclasses</option>
<option>-dontskipnonpubliclibraryclassmembers</option>
<option>-allowaccessmodification</option>
<option>-repackageclasses ''</option>
<option>-keep public class ${mainClass} { public static void
main(java.lang.String[]); }</option>
<option>-keepattributes
InnerClasses,Signature,LineNumberTable,*Annotation*,EnclosingMethod</option>
<option>-keepclassmembers enum * { public static **[] values();
public static ** valueOf(java.lang.String); }</option>
<option>-dontwarn org.spout.**</option>
<option>-dontwarn com.google.**</option>
</options>
<proguardInclude>${basedir}/proguard.conf</proguardInclude>
<includeDependency>false</includeDependency>
<libs>
<lib>${java.home}/lib/jce.jar</lib>
<lib>${java.home}/lib/jfxrt.jar</lib>
<lib>${java.home}/lib/rt.jar</lib>
</libs>
</configuration>
<phase>package</phase>
<goals>
<goal>proguard</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>net.sf.proguard</groupId>
<artifactId>proguard-base</artifactId>
<version>5.2.1</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>net.sf.proguard</groupId>
<artifactId>proguard</artifactId>
<version>4.4</version>
</dependency>
</dependencies>
</plugin>